Nipple invagination is nipple invagination. Nipple invagination is a common breast disease, including primary nipple invagination and secondary nipple invagination. If it is primary nipple invagination, you can lift the nipple to promote the elastic recovery of the skin and muscles supported by the nipple. Or use a breast pump to suck the nipple regularly to promote nipple protrusion. If you still can't pull out the nipple, you can consider nipple plastic surgery. The main surgical method is mastectomy, which can restore the nipple to its normal shape. Secondary nipple invagination often suggests mastitis, breast tuberculosis or breast cancer. At this time, you should go to a regular hospital for breast surgery, and if necessary, do a nipple puncture biopsy to clarify the cause, and then decide whether to operate after a comprehensive evaluation by a specialist. In short, when nipple invagination occurs, we must seek medical attention in time, make clear the cause, and avoid credulity, so as not to cause serious clinical consequences.